The Uni-ball Signo UM-153 writes smoothly and has incredible broad ink flow consistency. Its durable tip provides a sturdy writing base and its ink stands the test of time with its archival, waterproof, and acid-free properties. The smoothness of this gel pen is amplified by its comfortable rubber grip and postable pen cap. However, be sure to cap your Signo pen to keep the pens tip safe and intact. This gel pen is perfect for writing on dark colored paper, scrapbooking, and writing on photographs! Uni-ball Signo UM-153 Tip: 1.0mm Available in regular colors, metallic colors and white View All Uni-Ball Pens About Uni-ball: Uni-ball and Uni are subsidiaries of Mitsubishi Pencil Company. First founded in Tokyo in the late 1800s, they released their first ballpoint pen in 1959 and developed their first style of rollerball pen in 1979. Mitsubishis products include mechanical pencils, refills, markers, correction tapes, and their acclaimed gel and rollerball pens.